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公开(公告)号：EP2047423B1
公开(公告)日：2012-01-04
申请号：EP07793922.1
申请日：2007-07-13
申请人： Tandberg Telecom AS
发明人： BJØNTEGAARD, Gisle
CPC分类号： G06T5/002 , G06T5/50 , G06T2207/10016 , G06T2207/20012
摘要： The present invention is related to pre-processing of video data before coding and transmission. In particular, the present invention discloses a method for noise reduction in High-Density video images. This is realized by a low implementation-complex filter filtering the raw pixel data output of a video camera with low pass property for both spatial and temporal noise combined with an adaptation of the filter based on the high frequency content of the picture, leaving most of the image content unaffected by the filtering process.
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2.发明公开METHOD, APPARATUS AND COMPUTER READABLE MEDIUM FOR CALCULATING RUN AND LEVEL REPRESENTATIONS OF QUANTIZED TRANSFORM COEFFICIENTS REPRESENTING PIXEL VALUES INCLUDED IN A BLOCK OF A VIDEO PICTURE 审中-公开方法，设备和计算机可读介质用于计算的游程长度和LEVEL陈述量化结束变换系数用于表示像素值的视频图像的块
公开(公告)号：EP2384581A1
公开(公告)日：2011-11-09
申请号：EP09836441.7
申请日：2009-12-28
申请人： Tandberg Telecom AS
CPC分类号： H04N19/93 , H04N19/129 , H04N19/132 , H04N19/176 , H04N19/18 , H04N19/60
摘要： A process for calculating run-and-level representations of quantized transform coefficients includes packing each quantized transform coefficients in a value interval (Max, Min) by setting all quantized transform coefficients greater than Max equal to Max, and all quantized transform coefficients less than Min equal to Min; reordering the quantized transform coefficients resulting in an array C of reordered quantized transform coefficients; masking C by generating an array M containing ones in positions corresponding to positions of C having non-zero values, and zeros in positions corresponding to positions of C having zero values; and for each position containing a one in M, generating a run and a level representation by setting the level value equal to an occurring value in a corresponding position C, and setting the run value equal to the number of proceeding positions relative to a current position in M since a previous occurrence of one in M.
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3.发明公开METHOD, DEVICE AND A COMPUTER PROGRAM FOR PROCESSING IMAGES IN A CONFERENCE BETWEEN A PLURALITY OF VIDEO CONFERENCING TERMINALS 审中-公开方法，设备和计算机程序用于处理图像在这两者之间几个视频会议终端的会议
公开(公告)号：EP2382779A1
公开(公告)日：2011-11-02
申请号：EP09835319.6
申请日：2009-12-15
申请人： Tandberg Telecom AS
发明人： PEPPERELL, Andrew
CPC分类号： H04N7/152
摘要： Processing images in conference between a plurality of video conferencing terminal. The method includes providing properties of terminals, defining a number of groups based on the properties of the terminals, then determining an ordered list of the a number of groups, and determining a pane layout for displaying images from the terminals. The pane layout is determined based on the provided properties of the terminal the pane layout is displayed on and the properties of the other terminals in the conference. Then, mapping the ordered list of the number of groups to the respective determined pane layout, and providing at least one composite image stream to each of the terminals according to the selected pane layout and mapping of the a number of groups. Different types of telepresence endpoints, (e.g. different manufacturers, numbers of screens/cameras, etc.) can thus interoperate well in the same video conference.
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公开(公告)号：EP2380349A1
公开(公告)日：2011-10-26
申请号：EP09833677.9
申请日：2009-11-27
申请人： Tandberg Telecom AS
发明人： CATCHPOLE, Jason , COCKERTON, Craig
CPC分类号： G06K9/00288 , G06F17/30793 , G06F17/30817 , G06K2009/00328
摘要： The present invention provides a system and a method making names of participants in an archived conference or presentation searchable after being stored in the archive server. According to the invention, one or more media streams coded according to H.323 or SIP are transmitted to a streaming/archiving server for converting multimedia content into a standard streaming format. A face recognition unit analyzes the video part of the multimedia content to detect faces and identify the detected faces. The face recognition unit utilizes protocol information and other video conferencing recourses to greatly reduce the search space during face recognition process, hence reducing computational cost and improving robustness of recognitions.
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公开(公告)号：EP2380130A1
公开(公告)日：2011-10-26
申请号：EP09833682.9
申请日：2009-12-17
申请人： Tandberg Telecom AS
CPC分类号： H04N19/117 , H04N19/182 , H04N19/59 , H04N19/61 , H04N19/80
摘要： A method for calculating pixel values of interpolated pixel positions located between integer pixel positions in frames of a video picture by a predefined filter operation, the method including: storing the pixel values of the integer pixel position; determining to which of a number of predefined resolution formats the video picture is adapted; defining a fixed width (W) and fixed height value (H) for the frames corresponding to a resolution format determined by the determining; loading a first set of memory addresses for the memory of the video processing apparatus corresponding to a plurality of the pixel values of integer pixel positions; and executing a filter operation on the plurality of the pixel values of integer pixel positions and calculating a plurality of the pixel values of the interpolated pixel positions.
摘要翻译： 一种用于通过预定义的滤波操作来计算位于视频画面的帧中的整数像素位置之间的插值像素位置的像素值的方法，所述方法包括：存储整数像素位置的像素值; 确定所述视频图片适应于多个预定义分辨率格式中的哪一个; 为对应于由所述确定确定的分辨率格式的帧定义固定宽度（W）和固定高度值（H） 将对应于整数像素位置的多个像素值的视频处理装置的存储器的第一组存储器地址加载; 以及对整数像素位置的多个像素值执行滤波操作，并计算内插像素位置的多个像素值。
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6.发明公开A CONTROL SYSTEM FOR A LOCAL TELEPRESENCE VIDEOCONFERENCING SYSTEM AND A METHOD FOR ESTABLISHING A VIDEO CONFERENCE CALL 审中-公开控制系统用于生产VIDEOKONFERENZRUFS的局部网真/视频会议系统及方法
公开(公告)号：EP2338277A1
公开(公告)日：2011-06-29
申请号：EP09814834.9
申请日：2009-09-17
申请人： Tandberg Telecom AS
CPC分类号： H04N7/147 , G06F3/0486 , G06F3/04886 , H04N7/152
摘要： A computer-implemented interface for a local telepresence video conferencing facility, pre-assigns displays at the local telepresence video conferencing facility to respective video images from remote telepresence video conference facilities such that respective video images from the remote telepresence video conference facilities will be displayed on corresponding displays at the local telepresence video conferencing facility once communications connections are made. A controller pre-assigns the displays according to control commands from a tactile input device prior to establishing the communication connections with the remote telepresence video conference facilities. A touchscreen display presents avatars of remote conference participants to illustrate pre-assignments of displays to particular remote telepresence video conference facilities prior to the communication connections being made.
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公开(公告)号：EP1960951A4
公开(公告)日：2011-05-18
申请号：EP06835718
申请日：2006-12-08
申请人： TANDBERG TELECOM AS
IPC分类号： G06Q10/00 , H04M20060101
CPC分类号： H04M1/274516 , G06Q10/10 , H04M1/274583 , H04M1/72569 , H04M1/72572
摘要： A system including: a system control unit; a context aggregator operatively connected to the control unit, where the context aggregator is configured to on predefined events, receive context information about a user from two or more context sensors, calculate an aggregated presence status for the user based on the received context information, wherein a classification algorithm is used to calculate the aggregated presence status; and a user database operatively connected to the control unit, wherein the user database is configures to store user information for plural users, the user information comprising at least a user name, the aggregated presence status, available communications terminals and a probability of reaching the user on each of the available communication terminals, wherein the available terminals and their probability is a function of the aggregated presence status, wherein the system control unit is configured to, on demand distribute at least parts of the user information, including the available communication terminals and their probability, from the user database to a requesting device or application.
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8.发明授权AN ARRANGEMENT AND METHOD FOR PERMITTING EYE CONTACT BETWEEN PARTICIPANTS IN A VIDEOCONFERENCE 有权安排和方法参与者之间的视频会议眼睛接触创造有利
公开(公告)号：EP1611744B1
公开(公告)日：2010-12-22
申请号：EP04720295.7
申请日：2004-03-12
申请人： Tandberg Telecom AS
CPC分类号： H04N7/144
摘要： The present invention discloses an arrangement and a method of a videoconferencing end-point providing eye contact between users at different sites. The invention allows for placing the conference camera in the light beam of a projector apparatus without degrading the camera-captured view by the projector light. This is provided by generating a black spot in the light beam covering the camera lens, and by adjusting the position and/or size of the black spot according to a camera position detector, which may be the camera itself or one or more light sensors around and close to the camera lens.
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公开(公告)号：EP2235928A1
公开(公告)日：2010-10-06
申请号：EP08862488.7
申请日：2008-12-16
申请人： Tandberg Telecom AS
IPC分类号： H04M9/08
CPC分类号： H04M9/082
摘要： Different sampling rates between a playout unit and a capture unit are compensated for. The playout unit receives samples from a computational unit, and the capture unit sends samples to the computational unit. A playout fifo buffer operates in a playout time domain, and a capture fifo buffer operates in a capture time domain. The computational unit is synchronized to a common clock. A first relationship is calculated between the common clock and a playout fifo buffer read pointer, and a second relationship is calculated between the common clock and a capture fifo buffer write pointer. For each sample in the playout time domain a corresponding sample in the samples from said computational unit is found and sent to the playout fifo buffer. For each sample in the common clock time domain the corresponding sample in the capture time domain is found and sent to the computational unit.
摘要翻译： 补偿播出单元和捕获单元之间的不同采样率。 播出单元从计算单元接收采样，并且捕获单元将采样发送到计算单元。 播出FIFO缓冲器在播出时间域中操作，并且捕获FIFO缓冲器在捕获时域中操作。 计算单元被同步到一个公共时钟。 计算公共时钟和播出FIFO缓冲器读指针之间的第一关系，并计算公共时钟和捕获FIFO缓冲器写指针之间的第二关系。 对于播出时域中的每个样本，找到来自所述计算单元的样本中的对应样本并将其发送到播出FIFO缓冲区。 对于公共时钟时域中的每个采样，捕获时域中的相应采样被发现并被发送到计算单元。
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公开(公告)号：EP1832104B1
公开(公告)日：2010-05-26
申请号：EP05821952.8
申请日：2005-12-21
申请人： Tandberg Telecom AS
IPC分类号： H04M9/08
CPC分类号： H04M9/082
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